题解

#include<iostream> 
#include<cstring> 
#include<cstdio>
using namespace std;
int main(){
	char s[201];
    string s1;
	gets(s);
	for(int i=0;i<strlen(s);i++){
		if(s[i]==' ' && s[i-1]==' ') continue;
		s1+=s[i];
	}
	cout<<s1;
	return 0;
}